Tension pad fob let-off pulleys



1. DEMYEN. TENSION'PAD FOR LET-OFF PULLEYS.

APPLICATION FILED NOV. 30, 1921.

2 sHIE'ETs-sHgEJ 2.

Patented Nov. 14, 1922.

JOSEPH DEMYEN, 0F PHILADELPHIA, IENNSYLVANIA..

TENSION PAD FOR 'LET-OFF PULLEYS.

Application tiled November 30, 192i. Serial No. 518,784.

T 0 all whom t mwg/ concern.'

Be4 it known that I, Josemi DnMrnN, a citizen of the United States, residing at Philadelphia, in the county of Philadelphi-a and State of Pennsylvania, have invented new and useful Improvements in a Tension Pad for Let-Off Pulleys, of which the following is a specification.

My invention relates to a new and useful improvement in a tension pad for warp let olf pulleys for looms and the like, and has for its object to provide an exceedingly simple and effective device of this description whereby the ropes or chains on the warp let off pulleys will work smoothly and positively in -all kinds of weather thereby providing a smooth positive tension upon the warp let off roll which will materially improve the product of the loom.

A further object of my invention is to prevent the waste of the powder now used upon let ofi' pulleys which waste hy accumulation upon the flor adjacent the loom becomes a source of annoyance and danger' by reason of making the Hoor slippery and thus causing frequent accidents.

With these ends in View, this invention consists in the details of construction and combination of elements hereinafterl set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains, may understand how to make and use the same, I will describe its construction in detail, referring by numerals to the accompanying drawings forming a part of this application, in which Fig. l, is a perspective of a portion of a warp let off roll showing a let olf pulley on one end thereof and illustrating the operation of my improved pad to said pulley.

Fig. 2f., is a perspective of a pad made in accordance with my improvement.

Fig. is a section on the line of Fig. 2.

Fig. 4, is a perspective of a slightly modt fied form of my invention.

Fig. 5, is a perspective showing the manner of folding the strip of fabric to produce a pad.

In carrying out my invention as here em* bodied, l represents the pad or container which is preferably composed of a loosely woven or orous fabric or any other suitable material olded and refolded to produce a porous distributor with a backing or cushion 2 and apocket 3, said pocket being intended for the reception of a suitable antifriction powder such as powdered soap stone,pumice stone or graphite. The layers of this pad may he stitched together as indicated at L or secured together in any other suitable manner.

ln producing this pad I prefer to utilize a strip of fabric and first fold the same upon the lengthwise lines 5 producing the flaps 6. as indicated in Fig. 5 and placing the desired quantity of anti-friction powder beneath the flap in the central portion of the strip and then folding the strip crosswise upon the dotted lines 7 so that the ends of the strips become flaps and superimposed upon the body after folding as will be readily understood. Y

By this construction it will be seen that the powder contained within the pocket may be gradually and evenly sifted therefrom for application as hereinbefore explained. l This pad is placed beneath the let off rope or chain 8 and against the face of the let oftl pulley 9 around which ysaid chain or rope is coiled as clearly shown in Fig. 1 and will thereafter apply a sufficient amount of powder' from the pocket of the pad to the .surfaces of said pulley to prevent the rope or chain from sticking or taking an undue grip upon said pulley.

In placing this pad beneath the coils of the let off rope said coils may be slightly spaced apart and will maintain this spacing by becoming embedded into the upper surfaceA of the pad which will greatly facilitate the action of the rope or chain upon the pulley and it is to be noted that as the inner surface of the pad which bears upon the pulley is constantly supplied with the anti-friction powder said pad will assist in maintaining an even grip between the rope or chain and pulley.

By the use of my improved pad I have found that the product of a loom is increased in quality since the given steady tension is maintained upon the cloth, thus avoiding defects and `flaws in the weave which would otherwise take place if this tension were materially varied as is the case in present day practice.

Another incidental but considerable advantage in the use of my improved pad is that the powder which has heretofore been applied directly to the pulley and shed from powder.

said pulley-to the floor making the latter slippery fromwhich many accidents have occurred is hereby entirely overcome, since the powder is `only appliedy tothe surfaces of the pulley by being held against the same and distributed during theI rotations thereof.

In F 4t, I have shown a slight modification of my improvement in which a rela tively stiff backing l0 is securedvto the pad l in any suitable manner, said backing being of leather, metal or other suitable' material. y

lWhen the powder witliintlie pocket of the pad` has become elaustefll the pad' is re'- moved and another substitutedtherefore and if desired thefremevedpadl may be opened and the pocket thereof again filled with This removal and substitution is exceedingly simple requiring no alteration er adjustment of" anyA part of "the loom.

While my invention is espeoiallyadapted for use upon the warp let ofi' pulleys of looms it is obvious thaty it may be used. to advantage upon let off pulleys or any other type of machine accomplishingthe same ree sults as here desoribedjy anda container may be made or manufactured in various shapes, forms or types and out of differenty kinds of material, such as metal, hardrubber, woven wire eteandwhicli Vriglit Il desire to reserve to myself.

Of'course I do not wish to be limited to the exactH detailsv ofv construction as herein shown as these may be varied' withinv the limits of the appended claims without departing` from the spirit of my invention.

Having' thus fully described my invention, what I claim as new and useful is il. As a new article of manufactura a pad for let off pulleys having a pocket therein for containinga suitable powder, the' outer wall of said pocket being capable of permitting the gradual passage ofsaid powder. i

2. A pad for .let off pulleys consisting of a strip of fabric folded longitudinally to form a body and two flaps folded crosswise to' produce a poc-keu said pocket being filled withan aiiti-frictionpowder. s

3. lnV combination with a let offy pulley and a rope coiled about said pulley of a powder containing pad interposed between the coils of said rope and the face of said pulley.

4; A 'pady for let off. pulleys comprising a coarsely woven fabric so folded as to pro--y duce a pocket and an antiefriotion powder contained within said pocket.

5. A padfor interposition between the face ofthe let off pulley and the rope or cllain coiled about the 'same,ncomprising a loosely woven fabric so folded as to` proi videl al pocket, anti-friction powder oontainedwlthin said pocket, and aibaclrer composedof stiffer material than the pad,

In testimony whereof, I have hereunto affixed my signature.

JOSEPH DlVlY'-N. 

